Rear sight for rifles



Jan. 13- 1925- 1,523,319

U. VOSMEK REAR SIGHT FOR RIFLES Filed April e. 1923 www@ Patented Jan. 13, 1925.

UNITED STATES ULRICH VOSMEK, F ANTIGO, WISCONSIN.

REAR SIGHT FOR- RIFLES.

Application filed Apri1 6, 1923.

To all whom t may concern:

Be it known that I, ULRICH VOSMEK, a citizen of the United States of America, residing at Antigo, in the county of Langlade and State of Visconsin, have invented certain new and useful Improvements in Rear Sights for Rifles, of which the following is a specification.

This invention relates to certain new and useful improvements in gun sights, and has particular reference to the rear sight and the laterally variable mounting thereof permittin rr laterally shifting movement of the rear sight relative to the gun barrel and front sight with a vertical screw adjustment operating in lieu of the usual step by step elevator.

The primary object of the invention resides in the provision of a laterally variable rear sight for gun barrels wherein a microineter adjustment thereof is rendered possible through the provision of a rack and pinion construction permitting minute adjustment thereof compensating for faulty inountings or displacement.

Vith the above and other objects in view as the nature of the invention is better understood, the same consists of the novel form, combination and arrangement of parts hereinafter more fully described, shown .in the accompanying drawing and claimed.

In the drawing, wherein like reference characters designate corresponding parts throughout the several views,

Figure 1 is a top plan view of a laterally variable gun sight constructed in accordance with the present invention, the same being illustrated as operatively positioned upon the barrel of a gun that is shown by dotted lines,

Figure 2 is a side elevational view of the sight,

Figure 3 is a longitudinal detail view taken on line III-III of Fig. 1 showing the set screw for retaining the variable sight in its adjusted position and the elevating screw for the sight arm,

Figure 4 is a detail cross sectional view taken on line IV-IV of Fig. 1, and

Figure 5 is a perspective view of the laterally variable or adjustable sight.

Referring more in detail to the accompanying drawing, the reference numeral 1 designates an elongated sight arm carrying a depending dove-tail-shaped lug 2 extending transversely of the forward end thereof Serial No. 630,304.

for anchoring in the upper side of a gun barrel 3 illustrated by dotted lines in Figs. l and 2, the sight arm 1 being rigidly mounted upon the gun barrel against laterally shifting movement in the usual manner.

A vertical screw adjustment associated with the rear end of the sight arm 1 operates in lieu of the usual step by step elevator mechanism, a set screw 4l being threaded through the rear end 5 of the sight arm with the lower end a thereof adapted for engagement with the upper face of the gun barrel as shown in Fig. 2 for obtaining the propel' elevation of the rear end of the sight arm. This screw adjustment permits extremely fine variations in vertical movement of the rear end of the sight arm and is more accurate than the step by step elevatingmechanism. Y

The laterally adjustable or variable sight embodies a base plate 6 preferably rectangular in plan view with slightly rounded ends as shown in Figs. 1 and 5, the upper opposite side edges of the base plate 6 being chainfered as at 7 to provide side ribs 8 and 9 while a perpendicular sight wall 10 projects upwardly and centrally of the base plate G with the forward face thereof concaved at 11 while the upper edge intermediate its ends has a sight groove 12. A series of rack teeth 13 are formed on the forward rib 9 at thel edge thereof for purposes presently to appear.

The rear end 5 of the sight arm 1 is constructed for transversely and slidably supporting the base plate 6 of the rear sightwall 10` the rear end 5 being cutaway to provide a transverse seat 14 having front and rear overhanging ledges 15 and 16 re spectively that confine the ribs 9 and 8 as illustrated in Fig. 3,

An adjustment screw is associated with the forward end of the enlarged rear portion 5 of the sight arm and the rack teeth 13 upon the rib 9, the adjusting screw embodying a disk head 17 rotatably seated in the socket 18 forme-d in the forward end of the rear end side, the screw head 17 being provided with a kerf 19 in its upper face and carrying a depending stud 20 that is swiveled in the rear end of the sight'arm as clearly shown in Fig. 3, one side of the screw head 17 being provided with rack teeth 21 meshing with the teeth 13 upon the laterally variable sight. To retain the sight 6 in its adjusted positions, a set screw 22 lll) threaded through the opening 23 formed in the base plate 6 of the sight, as shown in Fig. 5, engages the bottom wall of the sight pocket la as shown in Fig. 3 for anchoring the same in its adjusted position.

From the above detailed description of the device, it is believed thatthe construction and operation thereof will be readily understood, it being noted as illustrated in Fig. l,that the upper faceA of the-rear end 5 of thesight arm and the rear edge of the upper face of the base plate 6 that is eX- posed, are provided withgage niarks 24 that indicate proper alinement of the sight when laterally' shifted. To adjust the sight, a screw driver or similar implement' isY employed for rotating the screw head 17 in the desired direction, thereby transmitting transversely sliding movement to the variable sight as will at once be obvious from an inspection of Figs. l and 3.

lV'hile there is herein shown and described the preferred embodiment ofthe present invention,it is nevertheless to be understood that ininor changes may be made therein without departing from the spirit and scope of the invention as claimed.

lVhat is claimed as new is l; In a laterally variablev gun sight, a sight arm fixed at its forward end to a gun barrel, means for raising and lowering the rear endv of thesight arm, the rear end of the arrn having a transverse groove therein, a sight wall having a base plate slidable in the groove, a series of rack teeth formed on one edge of the base pla-te, a disk rotatable in the siglitarrn and having peripheral teeth engaging the raclr teeth, said disk having a ke-rf-slotin the upper side thereof to facilitate operation in laterally shifting the sight wall, and a set screw carried by the base plate adapted to engage the sight arin. to hold the sight wall in adjusted position.

2. In a laterally variable gun sight, a sight armV having any en'd provided with a'transverse groove with undercut sides, a sight wall having a base plate fitting and slidable in the groove, said base plate having` rack teethfon one edge, said arm having a recess in its upper face communicating with the groove 'and further having a frusto-conical recess in its lower face opening concentrically into the first recess, a

gear housed entirely inthe first recess and meshingA with said rack, the upper face of the gear being ush with the upper face of the arin and having a screw kerf, and a truste-conical stub sha-ft on said gear held in said second recess to retain the gear in position.

ln testimony whereof I my signature.

U LR-ICH VOSMEK. 

